It gives them a great education not only about money, but about how to maintain a house (yes I know they aren't going to rewire it themselves at that age). 

I like the concept of a multifamily but the average age of these tends to be really high and I couldn't see myself dealing with 100 year old homes.

You should screen multiple property management companies before selecting one to make sure that they're the right fit for your property based on their past experience with properties of similar size, age, tenant class, and area.2. 

Your architectural plan creation timeline varies greatly with the locale, municipality, architect's/engineer's workload & expertise, lot size, site utilities, soil conditions, age of current home, etc...

What is the age of the property and risk of large repair cost and vacancy rates.  

Especially in this day and age with all this information online.

The age and potential maintenance costs of those units worry me a bit, though.

If she is under age 59 1/2, then an addition 10% penalty.  

@Robert Kirkley, when I was your age, I would play this game to further squeeze my expenses down: when ordering fast food, I’d find what I want on the menu, subtract a dollar from that total, then use that amount to order something else.

I've always been interested in Finance (especially in Hedge Funds) starting at the age of 15/16 years.